Hi, background story: I've used TO Niacinamide since a year ago. And paused for several weeks. Yesterday I tried to use it again but it kinda sting, I legit thought because my skin needs to adapt again to use Niacinamide. Then, today I use my sunscreen that contains 5% Niacinamide it left my face red and also a bit sting.

Q: Is it possible that my face can no longer tolerate Niacinamide? Thanks!

Dose of Niacinamide

Hi, does any of you know and understand how to differentiate between these:
• Sensitive - a skin type
• Allergy - when one of the ingredients make your skin react
• The product just doesn't suit your skin type - it leads to breakouts, bumps, etc

Sometimes I'm still confused between those three things, so all of these time I considered my skin to be sensitive and sensitized. If any of you can help me, I'd be grateful and learn something from you. 

Anyway, nice to e-meet you all 👋

Sensitive, allergy, or just doesn't suit your skin?

Does taking vitamin c supplement has the same effect as using vitamin c serum on your face?

I haven't read any research discussing about this, so if anybody ever come across this topic please attach the reference too. Thank you!

Vitamin C

First HA I ever tried and proud to say it&#39;s gonna be my holy grail hydrating toner. The texture is somewhat light and sticky.

myskinjo